Animated textures on a mesh plane?
The images have to be named with the same base name followed by a number.

The simplest way to import them into blender is to use the Import Images as Planes addon.
File &gt; Import &gt; Images as planes.

Select the images you want.
Press N or click on the gear icon on the right of the window to enable the options and select Animate Image Sequences


Or manually add an image sequence node Add &gt; Texture &gt; Image Sequence. Set the number of frames and start frame.
Then just enable Auto Refresh.
To have the images on a loop, use Cyclic